\usepackage{amsmath} \usepackage[math-style=upright]{unicode-math} % Set the main text font using TeX Live's actual Concrete filenames \setmainfont{cmunorm.otf}[ Extension = .otf, UprightFont = cmunorm, ItalicFont = cmunorm, % Map italics to the upright file to eliminate it BoldFont = cmunobx, % TeX Live's Concrete Bold file BoldItalicFont = cmunobx % Map bold-italics to regular bold ] % Use the correct TeX Live filename for Concrete Math \setmathfont{Concrete-Math.otf} %make integral sign upright \setmathfont{NewCMMath-Regular.otf}[ range={"222B-"2233, "2A0C-"2A1C}, StylisticSet=2 ]
lualatex index.tex
make4ht -ulm default -a debug index.tex "mathjax,htm"